package thread;

import java.util.concurrent.locks.ReentrantLock;

public class Demo42 {
    private static int count = 0;

    public static void main(String[] args) {
        ReentrantLock lock = new ReentrantLock(true);

        Thread t1 = new Thread(new Runnable() {

            @Override
            public void run() {
                for (int i = 0; i < 50000; i++) {
                    lock.lock();
                    try{
                        count++;
                    }finally {
                        lock.unlock();
                    }
                }
            }
        });

        Thread t2 = new Thread(new Runnable() {

            @Override
            public void run() {
                for (int i = 0; i < 50000; i++) {
                    lock.lock();
                    count++;
                    lock.unlock();
                }
            }
        });
        t1.start();
        t2.start();
        try{
            t1.join();
            t2.join();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        System.out.println("Final count: " + count);
    }
}
